The following information (Health Effects, Handling/Disposal, and Ingredients) is taken from the product label and/or the Material Safety Data Sheet (MSDS) prepared by the manufacturer. The National Library of Medicine does not test products nor does it evaluate information from the product label or the MSDS. (What is an MSDS?)

Health Effects

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Warnings:

MAY BE HARMFUL IF SWALLOWED, INHALED OR ABSORBED THROUGH THE SKIN
CAUSES MILD EYE IRRITATION AND MODERATE SKIN IRRITATION
REPEATED DERMAL EXPOSURE MAY CAUSE SKIN SENSITIZATION REACTION
AVOID BREATHING VAPOR OR SPRAY MIST
AVOID CONTACT WITH EYES, SKIN, OR CLOTHING
KEEP OUT OF REACH OF CHILDREN.

Acute Health Effects:

From MSDS
POTENTIAL HEALTH EFFECTS
EYES: This product may be mildly irritating to the eyes. Eye irritation may include; discomfort, redness, swelling and blurred vision.
SKIN: This product is a moderate dermal irritant and repeated skin contact may cause an allergic skin reaction in some individuals.
INGESTION: If swallowed, this product may cause gastrointestinal tract irritation.
INHALATION: Overexposure to the spray mist may be irritating to the respiratory tract. If inhaled, this substance is considered practically non-toxic to internal organs.
COMMENTS HEALTH: This product contains esfenvalerate, a cyano-pyrethroid that has the potential to cause temporary dermal paresthesia, e.g. burning, tingling, stinging sensations, that may occur following overexposure. However, using spray dilutions as indicated on the product label, it is unlikely that skin exposure to the spray mist will deliver sufficient concentrations of the active ingredient to trigger the dermal symptoms.

Chronic Health Effects:

From MSDS
GENERAL COMMENTS: Paresthesias: Esfenvalerate is a cyano-pyrethroid insecticide that has been associated with skin paresthesia in cases of extensive overexposure. The paresthesia symptoms are transient and consistent of tingling, burning, stinging sensations at the site of contact. The intensity of the sensory effect depends upon the extent of overexposure, individual skin sensitivity and environmental factors, e.g. hot, cold, pressure, etc. Clinically, the cutaneous sensations may be delayed a few hours, peak around 8-12 hours and remit within a few days. The sensations are usually not accompanied by a visible irritation or rash.
TERATOGENICITY: Esfenvalerate is not considered to be a teratogen. Results of the rat and rabbit teratology investigations indicated that the NOEL's for maternal and developmental toxicity in both species were 2.0 and 20 mg/kg/dy (highest dose tested), respectively.
REPRODUCTIVE TOXIN: Results of the esfenvalerate 2-generation reproduction study demonstrated that the chemical was not associated with any adverse reproduction effects. The NOEL was 3.75 mg/kg/dy.
MUTAGENICITY: Based on the results of both in vivo and in vitro mutagenesis testing, esfenvalerate is not considered to be a mutagen.

Carcinogenicity:

From MSDS
CARCINOGENICITY COMMENTS: Results of rat and mouse lifetime feeding studies did not demonstrate any evidence that fenvalerate (esfenvalerate major isomer) was associated with carcinogenic activity. The results of the rat and mouse chronic feeding studies indicated the NOELs (no observable effect levels) were 12.5 and 15 mg/kg/day, respectively. Based on the results of the investigations, EPA has classed fenvalerate in carcinogenicity class E (no evidence of carcinogenicity in either rats or mice). In addition, the chemical is not considered to be a carcinogen by IARC, NTP, OSHA or ACGIH.

First Aid:

From MSDS
EYES: Hold eye open and rinse slowly and gently with water for 15 to 20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eyes. Call a poison control center or doctor for treatment advice.
SKIN: If on skin or clothing, take of contaminated clothing. Rinse skin immediately with plenty of water for 15 to 20 minutes. Call a poison control center or doctor for treatment advice.
INGESTION: If swallowed, call a poison control center or doctor immediately for treatment advice. Have person sip glass of water if able to swallow. Do not induce vomiting unless told to by a poison control center or doctor. Never give anything by mouth to an unconscious person.
INHALATION: Move person to fresh air. If person is not breathing, call 911 or an ambulance, then give artificial respiration, preferably by mouth-to-mouth, if possible. Call a poison control center or doctor for further treatment advice.

From MSDS
GENERAL PROCEDURES: READ AND OBSERVE ALL PRECAUTIONS ON PRODUCT LABEL. DO NOT USE OR STORE near flame, sparks or hot surfaces. USE ONLY IN WELL VENTILATED AREA. Exposure to heat or prolonged exposure to sun may cause container to burst. Do not puncture, incinerate, or store above 120 F. Do not apply directly to water or wetlands. Do not contaminate water by cleaning of equipment or disposal of waste. For help with any spill, leak, fire or exposure involving this material, call day or night (800) 454-2333.

ECOTOXICOLOGICAL INFORMATION: This material is highly toxic to fish. Do not apply directly to water. Drift from treated area may be hazardous to organisms in adjacent aquatic sites. Do not pour product or rinse water down any drain.
This pesticide is classed as very low to slightly toxic to birds and highly toxic to bees by direct contact. Once foliar residue has dried, the hazard is insignificant.

Disposal:

From MSDS
DISPOSAL METHOD: Unused product may be disposed of by replacing cap, securely wrapping original container in several layers of newspaper and discarding in trash. Do not incinerate or puncture.